I’m not against those who work for sex, but the idea to earn for a living doesn’t seem nice. IMO, sex should be for 2 people (or more for others who prefer polyamory) who wants to be intimate/romantic with each other. My point is money should not be the purpose.
It’s not for you to be comfortable about unless you’re planning on paying or getting paid for it. That’s like someone who paints their miniatures and agrees to paint the miniatures of a friend not feeling comfortable about money being involved, because he’s doing that for other reasons, but there are professional miniature painters.
Anything you do for fun you’re likely to be uncomfortable charging for, but you need to remember that that’s not your job, and regardless of what your job is there’s a good chance that someone out there likes to do the same thing for fun and would feel uncomfortable charging people for it.